<span>The Columbian Exchange refers to a period of cultural and biological exchanges between the New and Old Worlds. Exchanges of plants, animals, diseases and technology transformed European and Native American ways of life. Beginning after Columbus' discovery in 1492 the exchange lasted throughout the years of expansion and discovery. The Columbian Exchange impacted the social and cultural makeup of both sides of the Atlantic. Advancements in agricultural production, evolution of warfare, increased mortality rates and education are a few examples of the effect of the Columbian Exchange on both Europeans and Native Americans</span>
Nominal scales labels variables without assigning any quantitative value. Nominal scales can be easily referred to as labels. For example this research has variables measuring the race of a driver :
White American Indian
African American
Hispanic
Multiracial
These scales do not overlap but are mutual exclusive and have no numerical sigficance attached to them.
